package cn.tedu;

import java.sql.*;

public class Demo03 {
    public static void main(String[] args) throws SQLException {
        Connection conn = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/empdb?characterEncoding=utf8&serverTimezone=Asia/Shanghai"
                ,"root","root");

        Statement s = conn.createStatement();
        //执行并插入数据SQL
//        s.executeUpdate("insert into emp(name) values ('tom')");
//        s.executeUpdate("update emp set name='杰瑞' where name='tom'");
//        s.executeUpdate("delete from emp where name='杰瑞'");
        ResultSet rs = s.executeQuery("select name,sal from emp");
        while(rs.next()){
//            String name = rs.getString("name");
//            double sal = rs.getDouble("sal");
            //通过查询回来数据的位置获取数据
            String name = rs.getString(1);
            double sal = rs.getDouble(2);
            System.out.println(name+": "+sal);
        }
        System.out.println("执行完毕!");
        conn.close();

    }
}
